Lectures On Some of the Physical Properties of Soil
Lectures On Some of the Physical Properties of Soil
Robert Warington
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109, 122. TABLE XIV AVERAGE MONTHLY PEKCOLATION THROUGH BARE SOILS TWENTY INCHES AND SIXTY INCHES DEEP, ROTHAMSTED Rainfall. Percolation. Percolation per cent. Rain. 20-inch Gauge. 60-inch Gauge. 20-inch Gauge. 60-inch Gauge. inches. inches. inches. January . . February . . March . . . 2-51 2-04 1. 74 1-96 144 0-80 2. 06 1. 44 0-86 78-1 70-6 46-0 82-1 70-6 494 April . . . May ... June . . . 2-21 2. 28 2-52 0-67 0-60 0-63 0-68 0-59 0-60 30-3 26-3 25-0 30-8 25-9 23-8 July . . . August . . Septemb...er . October . . 3-03 245 2-86 3-20 0-84 0-56 0. 96 1. 78 0-77 0-50 0-75 1-50 27. 7 22. 9 33-6 55-6 254 20-4 26-2 46-9 November . 3-03 2-24 2-05 73-9 67-7 December 2-42 1-90 1. 81 78-5 74-8 Whole Year . 30. 29 14. 38 13-61 47-5 44-9 As the amount of evaporation from the soil is far greater in summer than in winter, the amount of drainage naturally PERCOLATION 91 varies in a contrary manner. The season of active drainage through a bare uncropped loam is shown by the figures in the table to commence in October and to continue till the end of February.
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